F · worse than 99% of San Francisco intersections

72 collisions in 5 years, 3 fatal, 310 street-condition 311 reports in 3 years

PARTIAL

Get the letter
The corner, three ways

16th and Rondel

AUDITED
San Francisco, district unresolved
Street View plus Gemini
16th and Rondel today, photographed by Google Street View AI visualization of a proposed fix at 16th and Rondel. Not a photograph.

TodayThe corner as Street View last photographed it. Imagery: Google.

Official record
Case fileevery date read from a stored record, none invented
  1. DataSFScored from the city's own recordsdate not recorded
  2. Google MapsPhotographedchecking the stored frame
  3. ExaPress readchecking stored coverage
  4. ApifyResidents heardchecking stored scrapes
  5. GeminiVisual auditchecking the stored audit
  6. GeminiFix drawnchecking the stored render
  7. The gateLetter verifiedchecking the stored letter
  8. YouSent: that part is yoursthe letter is drafted, never sent by us

Press coverage

found live, cited Press via Exa

Resident voices

scraped
Injury collisions, last 5 years
within 150m
Street-condition 311 reports, 3 years
within 150m
Supervisor district

The ask

DRAFT ONLY
Proposed fix
Continental crosswalks, corner daylighting, and a leading pedestrian interval
$250,000 to $350,000, order of magnitude
Funding route
Caltrans Highway Safety Improvement Program (HSIP)
NOT SENT TO ANY OFFICIAL
Dear Supervisor Fielder, I am writing to you regarding urgent safety concerns at the intersection of 16th and Rondel in District 9. This intersection shows more reported harm than 99 percent of San Francisco intersections, earning it a grade F on the Danger Index. No exposure normalization: the index ranks reported harm, not risk per crossing. City records document 72 injury collisions within 150 meters of this intersection in the last five years, including 3 fatalities. The Danger Index is computed over a tighter 80-meter core, so these figures are measured over different areas. In the last three years, there have been 310 street-condition 311 reports covering street defects, sidewalks, curbs, signs, streetlights, and blocked sidewalks. While no recent press coverage was found for this corner, press coverage of safety problems here goes back at least 12 years, to 2014, as the earliest we can find. An automated visual audit flagged a vehicle turning conflict zone in the Street View photograph, and city records corroborate this with 8 pedestrian crossing collisions in 5 years. City records also show 15 street-condition 311 reports in 12 months and 8 pedestrian crossing collisions in 5 years relating to faded or sub-standard crosswalk markings, though the visual audit did not find this. City records show 7 street-condition 311 reports in 12 months for inadequate street lighting, and 10 street-condition 311 reports in 12 months for poor curb or sidewalk condition; the visual audit did not find these issues in the photograph. I urge you to fund improvements including Continental crosswalks, corner daylighting, and a leading pedestrian interval. These are estimated to cost $250,000 to $350,000, order of magnitude, through the Caltrans Highway Safety Improvement Program (HSIP). Thank you for your attention to this critical matter. Sincerely, A resident of District 9
draftedby Gemini

Every figure in this letter is checked against the source records before it is shown. A draft that states something the records do not support is rejected and rewritten.

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Google GeminiGeminiAudits the real Street View frame for hazards, renders the fix, writes the letter
ExaExaFinds current press coverage of this intersection, cited
ApifyApifyScrapes what residents say on Reddit and Google Maps
Google MapsGoogle MapsStreet View frames, the corner thumbnail, and the city map
CloudflareCloudflareWorkers serve the page, KV holds corners, imagery and grades
DataSFDataSFCollisions and 311, queried by radius around the corner

Every claim about a dangerous corner, graded and traced to its source, ending in a picture of the fix and a letter to the Supervisor.